一个双极的有机分子向阳离子/阴离子宿主阴极相适应的聚合物电解质为准固态双离子电池
Linqi Cheng1, Lan Chen2, Jie Yu2
1Key Laboratory of Preparation and Applications of Environment Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, PR China; Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, PR China.
研究人员开发了一种新的阴极,使用双极有机分子来容纳阳离子和离子,增强聚合物电解质中的电荷载体,用于固态电池. 这一策略提高了准固态双离子电池的性能和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物科学 聚合物科学
背景情况:
- 聚合物电解质中的离子导电对于固态电池至关重要.
- 这些电解质中的阳离子迁移有助于树突生长和度极化,阻碍了电池的性能.
研究的目的:
- 提出并展示使用双极有机分子作为阴离子/阴离子宿主阴极的策略.
- 扩大聚合物电解质中的活性电荷载体,减轻离子迁移问题.
主要方法:
- 在准固态双离子电池 (QSSDIB) 中使用双极酸衍生物NiPc-(OH) 8作为阴极材料.
- 研究了NiPc-OH) 8阴极和基于聚乙烯化物-六烯的凝聚合物电解质 (PVDF-HFP) 之间的接口兼容性.
主要成果:
- NiPc-(OH) 8阴极在50 mA/g时显示出高特异容量248.2 mAh/g的高特异容量.
- 与使用液体电解质的QSSDIB相比,QSSDIB的周期稳定性得到了改善.
- 在NiPc-(OH) 8上,外围的多基替代剂促进了与凝聚合物电解质的兼容接口.
结论:
- 拟议的策略有效地扩大了活性电荷载体,通过托管阳离子和离子.
- 这种方法为固态电池中的离子迁移问题提供了解决方案.
- 这项研究为开发高性能QSSDIB开辟了新的途径.
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